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Fencer Vulns
medium 6.5

CVE-2018-1140 json

A missing input sanitization flaw was found in the implementation of LDP database used for the LDAP server.

published 2018-08-22 8 y ago modified 2026-06-17 4 mo ago also EUVD-2018-11778

cvss
6.5
version 3.0, CNA
cisa kev
Not listed
not in CISA's catalog
epss
10.9%
EPSS 10.9% chance of exploitation in 30 days, percentile 95%
public exploits
0
none known

Summary

A missing input sanitization flaw was found in the implementation of LDP database used for the LDAP server. An attacker could use this flaw to cause a denial of service against a samba server, used as a Active Directory Domain Controller. All versions of Samba from 4.8.0 onwards are vulnerable

Patch / fix

  • samba samba 4.8.4
  • samba Debian 14, Debian 13, Debian 12 2:4.8.4+dfsg-1

debian advisories DEBIAN-CVE-2018-1140

  • samba SLE Module for Basesystem 15, SLE High Availability Extension 15 4.7.8+git.86.94b6d10f7dd-4.15.1

suse advisories SUSE-SU-2018:2318-1

  • ldb openSUSE Tumbleweed 2.3.0-1.3
  • samba openSUSE Tumbleweed 4.14.6+git.182.2205d5224e3-1.1

opensuse advisories openSUSE-SU-2024:10911-1openSUSE-SU-2024:11365-1

  • ldb Alpine 3.21, Alpine 3.20, Alpine 3.19 +11 more 1.3.5-r0
  • ldb Alpine 3.7 1.3.0-r1
  • samba Alpine 3.24, Alpine 3.23, Alpine 3.22 +14 more 4.8.4-r0

alpine advisories ALPINE-CVE-2018-1140

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2018-1140 updated cvss 6.5

libldb: LDAP server crash via distinguishedName

  • Red Hat Enterprise Linux 5 libldb Red Hat Enterprise Linux 6 pyldb, libldb, ldb-tools Red Hat Enterprise Linux 7 pyldb, libldb, ldb-tools Red Hat Enterprise Linux 8 libldb, ldb-tools, python3-ldb, python-ldb-devel-common Red Hat Storage 3 pyldb, libldb, ldb-tools
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

10.93% chance of exploitation in the next 30 days, higher than 95% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.0 6.5 CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD 3.0 6.5 CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD 2.0 3.3 AV:A/AC:L/Au:N/C:N/I:N/A:P

Affected products

  • The Samba Team samba

Classification

Weakness
  • CWE-20 Improper Input Validation

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.